Electric protective system.



Nd. 735,324. PATENTED AUG. 4 1903.

Y J. WEA'THERBY, JR.

ELECTRIC PROTECTIVE SYSTEM.

APPLICATION rmzn MAR. 24,1903. no menu. 2 snnms-snnm 1.

m vsma z zr PATENTED AUG. 4, 1903.

' J. WEATHERBY, JR.

ELECTRIC PROTECTIVE SYSTEM.

APPLICATION FILED MAR. 24, 1903.

N0 MODEL. 2 SHEETS-SHEET 2.

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I 2 a SWWMJIO'L 6/ Witnesses z 6/ v I Q]: 7 J:

NITED STATES Patented August 4, 190%.

PATENT OFF JOSEPH WEATHERBY, JR, OF NEW CUMBERLAND, PENNSYLYANIA,ASSIGNQB TO THE INTERNATIONAL BURGLAR IMMUNITY ooM- PANY, OFPHILADELPHIA, PENNSYLVANIA, A OORPORATIQN or DELAWARE.

" E Ec're-l c iee-ofrtorlv'sSYSTEM.

SPECIFICATION formingpart of Letters ;Patent Ne. 735,324., dated August4, 1903,

- Application filed March 24,;1 90-s ive system particularly designedfor use, in

connection with safes, vaults, buildings, and other structures. Theobject of the invention is to provide a a novel signal-box particularlydesigned for use in connection with my electric safe-protective systemshown and described in my application for patent filed August 11, 1902,Serial No. 119,293, the parts of which shall be so delicately arrangedand novelly constructed that an attempt to gain access to the box by anunauthorized person by subjectingthe box to blows for the purpose ofbreakingthe same,

" by surreptitiously opening the doorof the box,

or by boring with a drill through the box will be frustrated and thesignal given. r t p A further object is to providea box of thischaracter with openings to readily admit of the emission of sound andwith means whereby should a person" attempt torender; inoperative thesignal mechanism"byithe introduction or blasting of sandorotherpowdeiedl or granular material through said openings the signal mechanism willbe set into action. 1

With these and other objects in view the invention consists in certainnovel features of construction, combination, and arrangement of parts,which will be more fully described hereinafterand particularly definedReferring to the drawings, A'denotes the Serial to. 149,364. (No model.)

signal-box, which comprises two thin flexible metallic walls or casings21 21 ,one within and insulated from the other by rubber blocks orstrips 21, the outer wall or casing being provided with a hinged door 21and the inner wall or casing with a hinged door 21 The inner wall orcasing, which incloses the alarm mechanism, has a sound-emitting opening21, while the door of the outer wall ,or casing has a series of similaropenings 215' and also a lamp-chamber 21 provided with an arched top andan inclined base. The inclined base is formed with an aperture closed bya glass 21, "preferably colored, through which the light fromthe lamppenetrates. The outer wall or casing is provided with a sound-dome 21and has in its top openings 21 for the admission of the sound from theinner wall or casing to the dome; The dome is provided withsound-emitting openings 21 guarded from rain, sleet, and sno'wby a hood21 A fine metallic screen 21) lines the outer wall or casing and coversthe openings therein, and a similar screen covers the opening 21 in thetop of the inner wall or casing. The screens are electrically connectedto their respectivewalls or casings. A circuit-breaker for the outerdoor of the wall orcasing is provided and consists of a springcontact-point 21, electrically connected to the door 121, and

a spring contact-point 21 connected to and insulated from the door 21. st

j "Inclosed within the signat'box is a doublebalanced electromagnet 23,eachside of which hasa uniform high resistance.

2 4 and 25 denote the armatures of the electromagnet, and 26 and 27denote their springs, the latter of which are set to exert a greaterpull upon its armature than the former.

' 28 denotes a post rising from the base of the electromagnet andprovided with crossarms 29 30, which are elcctricallyiconnected to saidpost.

31 32 denote contact-points carried by the arms 29 30, respectively,which contact-points are engaged by the armature 25. 33 34"de'= note asimilar set of contact-points, the former 3 being electrically connectedto the cross-arm 29 and the latter being connected to but insulated fromthe cross-arm 30. These contact-points 33 34 are adapted to be engage bythe armature 24.

35 denotes an electromagnet of comparatively low resistance, alsoarranged within the signal-box; 36, its armature; 37, its audibleelectric signaling device in the form of a bell, and 38 a visualsignaling device in the form of a lamp which is arranged to flash raysof light by the vibration of the bell clapper or hammer.

75 denotes a circuit-breaker suitably arranged within the inner wall orcasing in position to receive sand or any other granular or powderedmaterial blasted or introduced through the screen-covered sound-emittingopening 21 and is so delicately balanced or adjusted as to be extremelysensitive,whereby upon the falling of small particles upon it thecircuit, which it normally holds closed, will be opened and the signalmechanism set into action. This circuit-breaker may be of any well-knownor approved construction; but the one shown in the accompanying drawingsis preferred and consists of a casing 76, having a partition 77,binding-screws 78 79, insulated from said casing and connected tocontactpoints 80, arranged within said casing. A reciver or pan 81 isprovided with a sleeve 82, which surrounds the upper end of the casingand has a free vertically-sliding movement. Projecting downward from thereceiver or pan and through the partition 77 is a stem 82, provided atits lower end with a head 83 to coact with the contact-points 80 andopen and close the circuit through same. This stem is also provided witha collar 84, between which and the partition 77 is confined delicatespring 85, the energy of which is exerted to hold the pan-or receiver inan elevated position and the head 83 in electrical contact with thecontact-points 80.

51 52 denote the opposite sides of a feed circuit which it is desired toprotect and which when broken, grounded, or short-ci'rcuited will causethe alarm to be sounded and a 7 light to be flashed. The sides of thiscircuit correspond to and are represented by the same reference-numeralsas the sides of the feed-circuit 50 shown'and described in myapplication for patent above referred to. I will now proceed to traceboth sides of the feed-circuit. Beginning atthe point a, the side 51 ofthe feed-circuit electrically connects with the outer wall or casing 21at a point 21% is insulated from the inner wall. or casing 21, leadsthrough the contact-points 21and 21 through binding-screw 78,through onecontact-point 80, through the head 83, through the other contact-point80, through the binding-post 79, and through the doublebalancedelectromagnet 23.. From this magnet the other side 52 of the circuitleads to and is electrically connected with the inner 61 denotes theelectric-light circuit for the lamp 38, oneside 61 of the circuitextending from the source of electricenergy or supply through the lampto the contact-point 61", while the other side extends from the sourceof electric supply to the armature 36 of the magnet 35.

62 denotes the alarm-circuit. The side 62 after leaving the bell isconnected to the post 28, and the side 62 after leaving the batterypasses through the electromagnet 35 and is provided with branches 62 and62 the former of which is connected to the armaturepost 63 and thelatter of which is connected to the armature-post 64.

Assuming the parts to be in the position shown in Fig. 2, should thewires 51 52 be cut, short-circuited, or grounded the doublebalancedmagnet becomes deenergized and the armature 24 released, thus allowingsaid armature to contact with the point 33, which completes thebell-circuit 62 and allows the alarm to be given. Upon deenergizing saidmagnet the circuit is completed between the post 64 and theelectromagnet 35 of the bellcircuit, thus causing the armature 36 ofsaid magnet 35 to repeatedly pulsate or vibrate and complete theelectric-light circuit 61, and thus cause the rapid flash of the lamp 38and so furnish evidence that the line-wires have been tampered with.Should it be attempted to gain access to the signal-box by breakingthrough the walls thereof by blows, the flexibility of the metal ofwhich the walls are composed would cause one wall to contact with theother and short-circuit the feed-circuit and sound the alarm and flashthe light precisely the same as when the wires 51 52 are cut ors'hort-circuited. 0n the other hand, if the door 21 be surreptitiouslyopened the circuit will be broken and the alarm will be sounded and thelight flashed, and, again, if it be attempted to gain access to thesignalbox by boring a short circuit will be made with the same results,for the reason that the drill after penetrating the outer wall or casingwill complete the circuit through itself the instant it contacts withthe inner Wall or casing. Should it be attempted to insert a drillthrough the sound-emitting openings of the outer wall or casing for thepurpose of boring through the inner wall or casing to obtain access tothe alarm mechanism, the tool must first pass through the fine metallicscreen before it touches the inner wall or casing, and the instant thetool passes through the screen and touches the inner wall or casing ashort circuit is made and the entire system placed in the same conditionas when the wires 51 52 are cut or short-circuited. Should it beattempted to render the signal mechanism inoperative by the introductionor blasting of sand or other granular or powdered materialthrough thesound-emitting opening, and thus clog the mechanism, the sand ormaterial will fall upon the pan or receiver 81, depress the same, andbreak the circuit through the contact points 80 and head 83. It willthus be seen that it is absolutely impossible for an unauthorized personto obtain access to the controlling mechanism arranged within the boxwithout giving an alarm.

From the, foregoing description, taken in connection with theaccompanying drawings, the construction, mode of operation, andadvantages of my invention will be readily apparent, it is thought,without requiring a more extended explanation.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of the invention.

Having thus described my invention, what I claim as new,and desire toprotect by Letters Patent, is-

1. In a signal box of the character described, the combination of theinner and outer metallic walls or casings insulated one from the other,the outer Wall or casing being provided with sound-emitting openings,and a fine metallic screen electrically connected to the outer wall orcasing over said openings, substantially as and for the purpose setforth.

2. In a signalbox of the character described, the combination of theinner and outer metallic walls or casings insulated from each other, theouter wall or casing being provided with a dome on its top and formedwith openings in its front and top, said dome also being provided withopenings, and a metallic screen covering said openings, substantially asdescribed.

- 3. The combination with a signal-box having a sound-emitting opening,and an electric signal mechanism arranged within the box, of a balancedcircuit-closer in circuit with said mechanism and adapted to break thecircuit by weight applied thereto, substantially as described.

4. The combination with a signal-box having a sound-emitting opening,and an electric signal mechanism arranged within. the box, of aspring-actuated circuit-closer in circuit with the signal mechanism andprovided with a receiver or pan, substantially as and for the purposeset forth.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOSEPH WEATHERBY, J R. Witnesses:

JAMES F. NAYLOR, J. O. DELANEY.

